pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 298

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

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6.0 Host-Controlled Modules and Host Interface
Banked Logical Device Registers Structure
Each functional block is associated with a Logical Device Number (LDN). The configuration registers are grouped into banks,
where each bank holds the standard configuration registers of the corresponding logical device. Table 38 shows the LDN
values of the PC87591L-N05 functional blocks. Any value not listed is reserved.
Figure 101 shows the structure of the standard configuration register file. The Host-Controlled Functions control and config-
uration registers are not banked and are accessed by the Index-Data register pair only, as described above. However, the
device control and device configuration registers are replicated over seven banks for the seven logical devices. Therefore,
two-dimensional indexing is used to access a specific register in a specific bank: the LDN register selects the bank (or logical
device) and the Index register selects the register within the bank. Accessing the Data register while the Index register holds
a value of 30
ister, within the logical device currently selected by the LDN register.
16
or higher physically accesses the logical device configuration registers currently pointed to by the Index reg-
BADDR0-1
HCFGBAH, HCFGBAL
SHBM
Figure 100. Host-Controlled Domain Detailed Block Diagram
Config
Strap
RTC
Registers
& Control
Config
298
Protection
Interface
(Continued)
KBC, PM
Host I/F
Wake-Up
Shared
System
Control
BIOS
LPC
Bus
Mobile
&
RESET1-2
LCLK
SERIRQ
LDRQ
LFRAME
SMI
CLKRUN
LPCPD
RING
LAD3-0
RI2
RI1
Revision 1.2